A Study on the Distribution and Evolution of Mining Induced Stress under the Condition of Multiple Mining

Wu, Xiaomin; Li, Guodong; Luo, Feng; Duan, Shuo

doi:10.1007/s10706-020-01582-1

Cited by 5 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e peak value of the abutment pressure before the gob is stable is larger than that after stabilization, but the extent of the area subject to stress reduction before achieving stability is smaller [40][41][42][43]. Figure 7 shows that due to the influence of the 2# coal pillar, there is a reverse convex slip zone formed by the break of the cantilever beam above the 2# coal pillar.…”

Section: Simulation Results Analysismentioning

confidence: 98%

Investigation of the Optimal Layout of the Roadway in Closely Spaced Ultra‐Thick Coal Seams Mining with Remaining Coal Pillars

Gao

Tian

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

The reasonable layout of the roadway in closely spaced, ultra-thick coal seam mining is of great significance to mining safety. Based on the research background of repeated roof leaks in the process of repairing the return air roadway in working face No. 30503 in the Tashan Coal Mine, theoretical analysis, in situ engineering testing, and numerical simulation were jointly adopted to evaluate the stability of the return air roadway under two schemes of repairing the original return air roadway and excavating a new return air roadway. The results show that the vertical mining-induced fissure above the roadway will cause severe damage to the roadway due to the influence of working-face mining when restoration of the roadway excavation is adopted. When choosing to excavate a new return air roadway, the new return air roadway just staggers the vertical cracks located in the top slab of the original return air roadway, putting the roadway in a state of stress reduction, making the roadway itself more stable and conducive to support. Therefore, the new air return tunnel was selected to establish the working face. To ensure safety of the working face during the mining of the original return air roadway, the original return air roadway was filled with high water content materials. Site investigation data show that this material plays a cushioning role in the filling section of the original return air roadway during the mining of the 30503 working face, and the deformation of the new return air roadway during the filling section crossing the original return roadway is stable and well controlled.

show abstract

Section: Simulation Results Analysismentioning

confidence: 98%

Investigation of the Optimal Layout of the Roadway in Closely Spaced Ultra‐Thick Coal Seams Mining with Remaining Coal Pillars

Gao

Tian

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…e electromagnetic wave attenuation coefficient is used to describe this phenomenon quantitatively. According to Maxwell's equation, ß s can be calculated [22]:…”

Section: Principle Of Electromagnetic Wave Ct Detectionmentioning

confidence: 99%

Research on Mining‐Induced Stress Distribution of Extrathick Coal Seams Based on Electromagnetic Wave CT Technology

Luo

et al. 2022

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

Fully mechanized caving mining in extrathick coal seams is currently the most efficient mining method. To figure out the mining-induced stress in extrathick coal seams which is significantly different from the normal ones is essential for mining safety. This research is based on the No. 3106 working face of Lu-Zi-Gou coal mine in China, which extracts extrathick coal seams by using the comprehensive mechanized top-coal caving method. According to the elastoplastic theory, a multiforce superposition mining-induced stress model is constructed in this research. In this model, the mining-induced stress is generated by the side coal seam of the stope, including the load formed by the broken roof blocks in the caving zone, the unbroken rock layers in the side of the goaf, and the rock layers in the bending zone. To verify the model, electromagnetic wave CT detection and borehole endoscopy are used to test the coal’s electromagnetic wave attenuation and internal joints. The results indicate that the mining of extrathick coal seams forms internal and external stress fields in the side coal seams of the stope. As the depth increases, the mining-induced stress first increases and then decreases within the two areas. According to the above conclusions, the width of coal pillars and the location of roadways between adjacent working faces can be reasonably determined.

show abstract

Experimental investigation into the damage evolution of sandstone under decreasing-amplitude stress rates and its implications for coalbed methane exploitation

et al. 2023

View full text Add to dashboard Cite

A Study on the Distribution and Evolution of Mining Induced Stress under the Condition of Multiple Mining

Cited by 5 publications

References 16 publications

Investigation of the Optimal Layout of the Roadway in Closely Spaced Ultra‐Thick Coal Seams Mining with Remaining Coal Pillars

Investigation of the Optimal Layout of the Roadway in Closely Spaced Ultra‐Thick Coal Seams Mining with Remaining Coal Pillars

Research on Mining‐Induced Stress Distribution of Extrathick Coal Seams Based on Electromagnetic Wave CT Technology

Experimental investigation into the damage evolution of sandstone under decreasing-amplitude stress rates and its implications for coalbed methane exploitation

Contact Info

Product

Resources

About